Samsung LE40R84B restarts after 20sek

[EvilGhozt]

Problem with Samsung LE40R84B

I have tried to change the bad caps on power board, and the tv still just clicking, then I changed the eeprom, and the tv fires up, I can see the picture for about 15-20sek and then the tv goes off and then comes on again, this repeats in infinity... any idea?

I have even tried two different eeprom (one "orginial" from samsung, and one equivalent with same specifications)

[tom66]

Re: Samsung LE40R84B restarts after 20sek

Have you tried -

TV in standby
On remote: INFO, MENU, MUTE, POWER.
Select Factory Reset.
Power TV on again.

[EvilGhozt]

Re: Samsung LE40R84B restarts after 20sek

Yes, I have tried that too :/

[EvilGhozt]

Re: Samsung LE40R84B restarts after 20sek

Anyone has any clue what could be wrong? Im stuck!

On power board there is a Pin that is marked "DIM", what is that? It has 3,6V when tv starts. 1V just before backlight lights up, and then it oscillates between 3V to 3,5V.

[tom66]

Re: Samsung LE40R84B restarts after 20sek

DIM is the brightness for the LCD screen.

[EvilGhozt]

Re: Samsung LE40R84B restarts after 20sek

I just got hold of a samsung le40r89 (with clicking problem that I fixed), the tv is basically the same.
So first tried switching power board, same problem there, so I swtiched it back.
Next I tried switching the digital board, and that solved the problem! Digital board / tuner board has to be broken. End of story...

Thanks tom66 for help anyway!